document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=236325>Question 236325</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car radiator has a capacity of 8 quarts of coolant which is 20% antifreeze. A mechanic needs to drain part of the radiator fluid and replace it with 100% antifreeze to bring the coolant in the system to 60% antifreeze. How much of the original coolant should be drained and replaced by 100% antifreeze to achieve the desired mix? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #173973 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=173973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">     A car radiator has a capacity of 8 quarts of coolant which is 20% antifreeze. A mechanic needs to drain part of the radiator fluid and replace it with 100% antifreeze to bring the coolant in the system to 60% antifreeze. How much of the original coolant should be drained and replaced by 100% antifreeze to achieve the desired mix?<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Let x = amount drained and replaced by 100% antifreeze<BR>\n" );
document.write( "then<BR>\n" );
document.write( ".20(8-x) + x = .60(8)<BR>\n" );
document.write( "1.6 - .20x + x = 4.8<BR>\n" );
document.write( "1.6 + .80x = 4.8<BR>\n" );
document.write( ".80x = 3.2<BR>\n" );
document.write( "x = 4 quarts\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );